Crusher-head.



` Patented Nov.2,1909. 2 SHEETS-SHEET 1.

R. BERNHARD.

GRUSHBR HEAD. APPLICATION FILED APB. 28.1908.

Patented Nov. 2,1909.

2 SHEETS-SHEET 2.

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'UNITED sTATEs PATENT, OFFICE.

. RICHARD BERNHARD, F MILWAUKEE, WISCONSIN, ASSIGNOR TO POWER AND MINf ING- MACHINERY"COMPANY, 0F JERSEY\. CITY, NEW JERSEY, A` CORPORATION". OF

NEW ERSEY.

eRUsHER-HEAD.

Patented Nov. 2, 190e.

Application led April-28, 1908. Serial No. 429,607.5

To ati "ib/wm fit1/Lay concern: l p

Be it known that I, RICHARD BERNHARD, a

Citizen of the United states, residing at Milz waukee, county of Milwaukee, and tate of 5 lliiseollsiii, have invented certain new' and useful Improvements in Crusher- Heads, fullyv described and represented in the following specification and\the accompanyi g drawings,forming a part 'of the same. r\

This lnvention relates particularly to that class of Crushers for stone,ore and the like, known as gyratory crushers, the especial object of the invention being\to provide a fastening for the crushing head which shall be self tightening so as to keep the head tight upon the shaft,\whether the Crusher be operated in one direction or the other.

In this class of Crushers it is difficult to bore the heads soins to make a pehfect tit. It has been customary, therefore` to zinc the head on the slrft so as to lill lip any spaces, but this leads to difiieulty on account of the zinc shrinking in cooling, thus {loosening the head. In the operation of these gyra-tory Crushers, also,v there is liabilityof loosening the head on the shaft, whether the liead is zinced on the shaft or not. In the case of heads made of two parts,'moreover;\

that is, with an'inner center or core and an outer shell 0r`1nantle, as is usual in this class of Crushers when very hard rock or ores are to be broken, so that the head may be made of .a mantle of mantranese steel over a cast iron core, additional diiiiculties and tendency to loosening of the mantle arise from the peculiar characteristics of the manganese steel. I

In many cases, especiall here Crushers are shipped to foreign count ies or sold to 40 agents for resale, it is impossible to determine beforehand in which direction the Crusher will be operated, and it is very important, therefore, to provide means by which the, head may be kept' tight on the one directionor the other. The resent invention provides n eans by which t e head is foretlontothe shakt taper automatically and the zine", if the `ead be zinced on,- exlande intofthe borel, fthe hed, in casef. e hea' becomes loose a d rotates on the shaftiin either direction thus keepin the hedtight upon the Sha in depen ntly 'of the direction in which the shaft whether the Crusher be operated in.

`tion with the acc mpan'ying dr Wings, formthread, and the nut` vbodying all the. eatures of th same intheir preferred form agili now be gi 'en in connecingpart of this \speciticat1on, nd the features forming th'einvention vv'll then be specifically pointechout in the claims. In the drawings :LTF igure 1 is a sectional perspective of a portion of a crus 1er shaft and solid head embodying the invention.

Fig. 2 is a similar view showing a\ mantle head.

Referri 1g now especially to Fig. It, A is the gyratdry shaft provided withgthensual tapered 'portion for redeiving the cr sher head B, and C the usual zinc or similar relatively soft metal filling, which is shown as kept in pla e by thes'eries of groovesor dents 1 on vthe interior surface of the head.' Immediately above the tapered portion, the shaft A. is formedxvith a-screw thread 10,

which may be eit er a right or left hand` ithread, the nuts be'ng formed accordingly.

As shown, the thr d 10 isa rivjht hand\.85

)be are formed accordinely. i

xWith the shaftfltlreal 10'co-acts a nut 11 an a lock nut 12' the n t 11 being reversely thre ded on its inneran outer-sides; that is, in the construction sho n,- having a right hand thread on the insid and a left hand threaq on the outside. Tpon the outer thread on nut 11 is nut- 13, id nut 11 has a iange extending over th nut 13. The nut 13 i faced on the botton to t the top of the he d B, and is shown as pinned to the head, the top of the head and tle bottom of the nut b ing provided lwith semi-circular radial gro ves 3 receiving the pin 4, these grooves bei g sutlicient in num `r and Vso arranged-th t, when the nut 13 .isi'tightened on the-shaft`in setting v.up the machine, one pair of these grooves-will come im line to receive the pin.

The o eration of the device is as fol` lows l131e gyxlatory movement of th shaft. tends to rotate the head onthe-shg'ift, \hi'ch movement is prevented as long as the head is tight, If the head loosens and tends to rotate in either direction, the devices shown will force the head down on the taper and tighten the head on the shaft.

Assuming that the crusher'is operated so that the tendency of the head is to rotate toward the left in the drawing, the outer lint 13 wjll turn toward the left with the head, and will screw up on the thread on the otitside of nut l1, so as to engage the iiange 2 and through this rotate the nut ll to the left. As the nut 11 turns toward the left it is screwed downward on the right hand thread tOvon the shaft, thus carrying down the nut- 115 and forcing the head B onto the taper so as to tighten the head.

Assuming that the Crusher is run so that the tendency of the head is to rotate toward the right in the drawing, the outer nut 13 will turn toward the right, and, as the lower inner nut 11 is locked by the upper nut 12 andrannot turn, the nut 11 forms a lstationary screw member and the outer nut 13 screws downward upon the left hand thread on the outside of nut 1l and forces the head down onto the taper to tighten the head. In this operation, the nut 1l obviously forms a `erond screw thread on the shaft, threaded revers-ely from the thread 10.

The construction and operation of the de vices shown in Fig. are exactly the same What I claim is l. The combination with a shaft having a taper, of a. head on the shaft, and devices acting by pressure against the Aend ot' the head and actuated bv the rotation of the head on the shaft to force the head onto the taper and tighten the head on rotation of the head in either direction.

2. The combination with a shaft having a taper, of a head on the shaft. reverse screw threads and reversely threaded nuts between said head Aand shaft, and means for operating one or the. other of said reversely threaded nuts by the rotation of the head on the shaft to force the head down on the taper and tighten the head on movement of the head in either direction.

3. The combination with a shaft having a taper and a screw thread, of a head on the shaft, a nut rotating with the head, and devices co-acting with said nut and shaft thread to force the head onto the taper and tighten the head on rotation'of the nut in either' direction.

d. The combination with a shaft having a taper and a screw thread, of a shaft. not coacting with the shaft thread and reverselyv threaded on the outside. a head on the shaft,

i a nut rotating' with the head and oo-acting as shown in Fig. 1, except that` the head is ai solid but isiformed of the inner center ,or core E and the outer shell or mantle l`,

tl'iecore beingshown as zincedonto the. shaft. and the mantle zinced onto the core. The core may be secured on the shaftin any common or suitable manner. securedl to and. acts on the mantle, and the .mantle is thus forced down by the nut 1B.`

as previonshvY described, so as to tighten'the mantle on the taper core and at the same time tighten the core on the shaft, thus always maintaining the manganese steel mantle tight on tht` iron core and the iron- -ore tighten the shaft.

it will be understood that the solid head,

,or either or both the core and mantle, may

Many other modifications may be made within the invention. i

'lhe invention 1s partlcula'rly applicable lo gvratory Crushers but may be applied to crush chin..

The taper or The nut 13 is with saidouter screw thread on the shaft nut, and means for automatically locking the shaft nut to the head nut on rotation of' the'head in one direction and means for holding the shaft nut against movement on a taper and a screw thread. of a shaft nut tai-acting with the shaft thread and re-V verseiy threaded on the outside. a head on the shaft, a nutrotating with the head, a flange on the shaft nut engaged by the head nut to carry the shaft nut with the head nut on movement Ain one direction. and means for locking the shaft nut against movementon the movement of the head nut in the opposite direction. f

(i. The combination with a shaft having a taper and a screw thread,` of a shaft nut coacting with the shaft thread and-reversely threaded on the outside, a head on the'shaft.l a nut rotating with the head. a flange on the shaft nut engaged by the head nut to carry the shaft nut with the head nut on movement. in one direction, and a lock nut to hold the shaft nut against movement on the'movement of the head nut in the oppo- .site direction.

In testimony whereof, FI have hereunto set my hand, in the presence of vtwo sabscribing witnesses.

RICHARD` BERNHARD.

Witnesses: 

